Arthur Pendragon, also known as King Arthur or Artoria Pendragon, is a legendary figure in the 'Fate/Grand Order' universe. He is a Saber-class Servant who embodies the ideals of chivalry and honor. In the series, Arthur is known for his noble spirit, strong sense of justice, and unwavering dedication to protecting humanity. He wields the sacred sword Excalibur and leads his fellow Servants in battles against formidable adversaries. His role in the series emphasizes the themes of leadership, sacrifice, and the pursuit of an ideal kingdom.